Steel Buildings in Europe

Part 10: Technical Software Specification for Composite Beams 10 - 21 6 FINAL STAGE 6.1 Effective width of the slab The effective width of the concrete slab is determined according to EN 1994-1-1 § 5.4.1.2. The following expressions are limited to the field of application of these specifications. b e = Min( L /8; B /2) where: B = ( B L + B R )/2  = (0,55 + 0,025 L / b e ) If  > 1,0 then  = 1,0 For a given design section, located at an abscissa x , the effective width b eff ( x ) is obtained from: If x  0,25 L : b eff ( x ) = 2 b e [  + 4(1 –  ) x / L ] If x  0,75 L : b eff ( x ) = 2 b e [  + 4(1 –  ) ( L – x )/ L ] Otherwise: b eff ( x ) = 2 b e Note that, by simplification, as stated in EN 1994-1-1 § 5.4.1.2(9), the distance b 0 between 2 rows of studs is taken equal to 0 for the determination of the effective width of the slab. 6.2 Shear connection 6.2.1 Resistance of a headed stud Design resistance According to EN 1994-1-1 § 6.6.3.1, the design resistance of a headed stud is the minimum value of the two following expressions: V 2 u,sc Rd / 4 0,8   f d P  V ck cm 2 Rd 0,29   d f E P  where:         1 0,2 sc d h  for 3  h sc / d  4 1   ,0 for h sc / d > 4 f u,sc is the ultimate tensile strength of the stud material. The maximum value is 500 N/mm 2 .